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Journal articles on the topic 'Punching machinery'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 March 2023

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1

Zheng, Hong, Guo Rui Wu, and Wei Hua Xu. "Study on Machinery Manufacturing CAD/CAM NC Machining Technology." Advanced Materials Research 875-877 (February 2014): 983–87. http://dx.doi.org/10.4028/www.scientific.net/amr.875-877.983.

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With the development of computer technology, CAD / CAM technologies have been widely used in the machinery manufacturing industry. They have brought fundamental changes to product design and manufacturing method. Based on the characteristics of punching machine processing technology, the main content of this paper is the study on boards CAM key technology taking NC machining applications for boards punching as the background. This study takes VC + + software as the platform and widely applies VC + + development tools and OpenGL technology in the process of developing graphical simulation system. The purpose of this study is to achieve drawing function, automatically extract pixels in AutoCAD graph such as holes, and automatically generate NC machining program by the extracted pixels on the basis of the pixel extraction. This can ensure the uniqueness and accuracy of the data, so as to improve the efficiency of programming.

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2

Li, Cheng Qun, and Yu Long Wu. "Production Research of PLC-Based Disc Motor Punching-Winding Machine." Advanced Materials Research 490-495 (March 2012): 1680–84. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.1680.

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Disc motor is a kind of motor which have a short axial dimensions and large start torque, it is widely used in machinery and equipment. Production quality of the motor stator and rotor determine the disc motor's performance .The motor stator and rotor which is produced by the method of punching-winding combined, have a high precision of motor underline slot and the motor performances good. Apply the PLC control system on the stator and rotor production, have a high degree of intelligence, easy to operate, realized the automation of the stator and rotor production and increased the productivity.

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3

Chu, Cheng Zhong, De Lei He, Yan Zhang, and Man Ping Cheng. "Design of Coconut Milk Automatic Extraction System." Advanced Materials Research 1010-1012 (August 2014): 1801–4. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1801.

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Abstract: The coconut is a one of the main economic crops in the tropical region of China, and is also a selling one in summer in Hainan.But the way to punch or suck the coconut juice is still a manual work and has more than one process at present. Therefore, we studied and designed a machinery which is based on hydraulic control system, and can finish the work of clamping coconut, punching sucking juice together. It has simple structure,costs low, easy to assemble and efficiency as well.

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4

Feng, Pei, Si Yu Liu, and Chong Chang Yang. "The Study of the Development of the Spinneret Automatic Fine Machine Based on Properties of Mechanical Materials." Applied Mechanics and Materials 327 (June 2013): 333–37. http://dx.doi.org/10.4028/www.scientific.net/amm.327.333.

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Spinneret automatic fine machine uses the host computer to control machinery to accurately punch pear-shaped needle into each micropores on the spinneret. It can not only remove the burrs formed in the production process of the spinneret, better able to make each of the microporous achieve the required size and dense material properties by punching. It can replace manual operation, improve the finishing efficiency and precision and have solved many defects in manual finishing operation. This paper focuses on the hardware and operating system of the spinneret finishing machine, also tests and verifies various parameters.

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Nasir Khan, Mohammad, Mohd Shadman Ansari, Md Irfan Ansari, Saifuddin, and Mohd Mukhtar Alam. "Fabrication and Automation of Drilling Machine by Using Arduino." IOP Conference Series: Materials Science and Engineering 1224, no. 1 (2022): 012007. http://dx.doi.org/10.1088/1757-899x/1224/1/012007.

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Abstract For precision workpiece manufacturing, the system should have good dimensional accuracy and surface finish. In applications such as drilling, punching, marking, boring, tapping, etc., the workpiece is first positioned, and then the tool executes its action while the moving axis remains stationary. In the traditional method of such applications, manufacturers use very expensive CNC machines to program the cycle and perform the same work. Large manufacturers can afford such expensive machines, but for the small machinery manufacturing industry, we must consider low-cost solutions that can provide high-quality output. In this study, we tried to propose a low-cost design that can be used to achieve functions similar to CNC. By applying this machine in industry, multiple generations can be obtained in a short time. It is very difficult to estimate the drilling depth when manually drilling with a traditional drilling machine, and the work will usually fail due to over-drilling. In many cases, it is difficult to measure the depth after the drilling is completed; especially the depth of the fine hole cannot be measured. Therefore, an automatic drilling machine that performs the drilling function according to the generated drilling depth and transmitted to the control circuit is indispensable; therefore, undertaking the study, it exposed the technology of the dedicated drilling machine. The automatic drilling machine designed here is very useful for the mechanical workshop. The machine is built with power feed technology and is designed to drill the job to a certain specified depth.

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Jiménez-Peña, Carlos, Constantinos Goulas, Johannes Preußner, and Dimitri Debruyne. "Failure Mechanisms of Mechanically and Thermally Produced Holes in High-Strength Low-Alloy Steel Plates Subjected to Fatigue Loading." Metals 10, no. 3 (2020): 318. http://dx.doi.org/10.3390/met10030318.

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High-strength low-alloy steels (HSLA) are gaining popularity in structural applications in which weight reduction is of interest, such as heavy duty machinery, bridges, and offshore structures. Since the fatigue behavior of welds appears to be almost independent of the base material and displays little improvement when more resistant steel grades are employed, the use of bolted joints is an alternative joining technique which can lead to an increased fatigue performance of HSLA connections. Manufacturing a hole to allocate the fastener elements is an unavoidable step in bolted elements and it might induce defects and tensile residual stresses that could affect its fatigue behavior. This paper studies and compares several mechanical (punching, drilling, and waterjet-cut) and thermal (plasma and laser-cut) hole-making procedures in HSLA structural plates. A series of 63 uniaxial fatigue tests was completed, covering three HSLA grades produced by thermomechanically controlled process (TMCP) with yield strength ranging from 500 to 960 MPa. Samples were tested at single load level, which was considered representative in HSLA typical applications, according to the input received from end users. The manufactured holes were examined by means of optical and electron microscopy, 3D point measurement, micro hardness tests, X-ray diffraction, and electron backscatter diffraction (EBSD). The results give insight on cutting processes in HSLA and indicate how the fatigue failure is dominated by macro defects rather than by the steel grade. It was shown that the higher yield strength of the HSLA grades did not lead to a higher fatigue life. Best fatigue results were achieved with laser-cut specimens while punched samples withstood the lowest amount of cycles.

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7

Guo, Yi, Zhi Qiang Li, and Jin Chao Shi. "A Hole-Punching System for the Pot-Seedling Hole-Punching Machine." Applied Mechanics and Materials 380-384 (August 2013): 160–63. http://dx.doi.org/10.4028/www.scientific.net/amm.380-384.160.

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[Purpos in order to solve design problems of the hole-punching system for the pot-seedling hole-punching machine, a system featuring reliable operation, simple structure and stable performance has been designed in accordance with working requirements. [Metho MATLAB is used for accurate calculation of the cam profile, with the calculated results imported to SolidWorks to produce cam profile curves. Such curves are then modified according to working requirements, thereby to build a 3D model for the cam mechanism. Finally, a 3D model for the complete hole-punching system is built with SolidWorks. [Result The hole-punching system designed herein is applied to the pot-seedling hole-punching machine and after performance test has proven to be able to meet working requirements and work reliably. [Conclusion The design of this system can provide theoretical basis and reference for related research.

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8

Tang, Zi Long, and Jian Chang Yuan. "Modal Experiment and Analysis of Needle-Punching Machine." Advanced Materials Research 605-607 (December 2012): 1257–60. http://dx.doi.org/10.4028/www.scientific.net/amr.605-607.1257.

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Modal analysis is a main method of researching the dynamic performance of the system structure. The deformation of Needle-punching machine frames in the work will affect the whole machine performance, which would seriously influence acupuncture frequency, reduce production efficiency. At the meantime, machine life will be shortened. Here, Needle-punching machine modal experiment has been done, the static natural frequencies and modal deformation animation of frame also has been calculated, that provides a reliable guide and basis for the actual work of deformation for needle-punching machine.

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9

Yan, Ling Yun, Ding Kuan Ye, Xin Min Zhang, Xun Shen, and Yun Yue Ye. "Analysis and Optimization of Starting Characteristics of Tubular Linear Induction Motor." Applied Mechanics and Materials 416-417 (September 2013): 322–27. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.322.

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Traditional mechanical punching machines are mainly driven by rotary motors and a complete set of intermediate transformation mechanism is needed, which results in a reduction of the system efficiency. This paper focuses on the tubular linear induction motor (TLIM) with low cost and simple control structure which directly drives the punching machines. In order to provide a theoretical basis for its further control system, the finite element model of this TLIM is established. The starting performances, such as the trust force, phase current, velocity, displacement and the load force, are analyzed by the finite element analysis (FEA). Moreover, the optimization of the starting trust force is investigated.

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10

Sun, Dong. "Adaptive Coupling Control of Two Working Operations in CNC Integrated Machines*." Journal of Dynamic Systems, Measurement, and Control 125, no. 4 (2003): 662–65. http://dx.doi.org/10.1115/1.1636779.

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To reduce work in progress in the plastic industry, integrated CNC punching and cutting machines have been used recently to combine a number of individual operations into one operation. Application of such integrated machines is confronted with a challenging problem of synchronizing two-axis motions. In this paper, an adaptive coupling controller is utilized to synchronize punching and cutting operations of the integrated CNC machine. The controller incorporates cross-coupling technology into adaptive control design, through feedback of position errors of two motion axes and the differential position error between two axes. It has been shown that the proposed controller guarantees asymptotic convergence to zero of both position errors and the synchronization error. Implementation of this new controller in real-time operations of commercial integrated CNC machines, highlights advantages of the proposed approach.

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11

Wang, Li Hua, and Xiao Qiang Wu. "The Design of Control System of Piston Pin Punching Recess Automatic Drilling Dedicated Machine Tool." Applied Mechanics and Materials 651-653 (September 2014): 895–98. http://dx.doi.org/10.4028/www.scientific.net/amm.651-653.895.

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The piston pin punching recess automatic drilling machine tool, is a dedicated machine tool designed and manufactured to solve the possess of piston pin punching recess. This paper studies the design of the dedicated machine’s control system, which uses open CNC technology, hydraulic technology, PLC technology, electrical technology, and human-machine interface technology. The control system can achieve the automation of feeding and blanking process. Replace of control panel, adopting touch screen to achieve operational control, and monitor the status of real-time job on the machine.

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12

Dems, Maria, Zbigniew Gmyrek, and Krzysztof Komeza. "Analytical Model of an Induction Motor Taking into Account the Punching Process Influence on the Material Properties’ Change of Lamination." Energies 14, no. 9 (2021): 2459. http://dx.doi.org/10.3390/en14092459.

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The technologies of cutting the cores of electric machines change the magnetic properties and the loss of the electrical sheets used, affecting the machine’s parameters, mainly power losses and efficiency. This is particularly important in the case of induction motors, which are a significant consumer of electricity. Therefore, the problem of increasing their efficiency is important from the point of view of environmental impact. The article presents a method of approximating a material’s magnetic properties based on the results of measurements carried out with specimens of various widths. The presented method allows for an approximate representation of the changes in the structure of the material caused by the cutting technology. It is used in the analytical method for calculating motor parameters, and gives results that are in good agreement with the measurement. This method can determine the operating parameters of electrical machines of various sizes and rated powers.

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13

Kutuniva, Kari, Jussi A. Karjalainen, and Kari Mäntyjärvi. "Effect of Convex Sheared Punch Geometry on Cutting Force of Ultra-High-Strength Steel." Key Engineering Materials 504-506 (February 2012): 1359–64. http://dx.doi.org/10.4028/www.scientific.net/kem.504-506.1359.

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Extremely high strength of the ultra-high-strength steels leads to increased load factors on the tooling machines and punching tools. This experimental study examines how much convex punch geometry affects cutting forces when punching ultra-high-strength steels. Tools used in punching tests were four different convex sheared rooftop punches and one conventional flat end punch, to which rooftop punches were compared to. The material in punching tests was ultra-high-strength steel Ruukki Optim 960 QC, with a thickness of 4 mm. The test material in punching tests was sheared with rooftop punches and a flat end punch and occurred cutting forces were measured. The qualities of punched holes were evaluated visually and the roundness measurements were also performed. The results show that the cutting forces of Optim 960 QC can be reduced radically with optimal convex punch geometry. With using 14-degree shear angle of the punch end, the cutting forces reduced up to 57 % compared to forces of the conventional flat end tool. However, largest tested shear angles caused several negative effects on the cutting quality of the holes and therefore they are not suitable in all applications. Punching tests proved that the cutting clearance had no appreciable effect on cutting forces when punching ultra-high-strength steel. Instead there was a noticeable effect on the quality of the punched hole, especially when large shear angles were used.

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14

Ostrovsky, Anatoliy. "IMPROVING OF ROUND HOLE CUTTING PROCESS IN THE SHEET METAL." ENGINEERING, ENERGY, TRANSPORT AIC, no. 2(113) (June 29, 2021): 31–37. http://dx.doi.org/10.37128/2520-6168-2021-2-4.

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Improving existing technological processes is an important stage in the development of all industries. As a consequence, this article is devoted to the analysis of the process of flanging round holes in sheet steel. The existing typical technological process, with a detailed analysis, gives grounds for substantiating the idea of an innovative solution. Changing the sequence of the traditional flanging method will ensure high productivity and material savings. Of the many promising methods of metal forming by pressure, which include flanging of round holes, two are given for comparison: the traditional one and the improved one. The methodology of the traditional direction, worked out over the years, provides for a clear sequence of the technological process using tools for marking, centering, making a hole and using tools for flanging. The final, after the previous operations of marking the centers of the holes, punching, making holes, is the flanging stage. The tapered punch (usually a metal rod) prevents the small-diameter hole from deviating from the marking lines and ensures the centering of the punch-blank-matrix system. Following the above steps, the conventional workflow involves positioning the workpiece over the surface of the punch hole to guide the tool in the desired direction. For the manufacture of a flanged hole, a special sharpening of the working part of the punch is performed so that the diameter of the central part of the tool is equal to the difference between the diameters of the guide hole of the matrix and the inner diameter of the workpiece of the part. To avoid further displacement of the hole, the workpiece is centered by placing it on the die and the next operation is supposed to lower the punch to flang the hole. As a result, the article touches on the topic, taking into account the widespread use of thin sheet metal, including in the agricultural sector, the feasibility of using an innovative idea to improve the technological process associated with the processing of sheet material, namely thin metal sheets. It is advisable to note that, for example, a material is considered that is characterized by its versatility, namely steel. Despite numerous sources devoted to the study of improving the flanging technological process, there are a number of issues, in particular, the extension of this direction to numerous varieties of metal materials that have surfaces with and without coating, various thicknesses within thin-walled rolled products. The most significant result is the improved technological process of flanging will find application in the system of efficient servicing of agricultural machinery.

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Tripathi, Premshanker R. "Automation by CAM in Punching Press Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. 5 (2021): 1569–74. http://dx.doi.org/10.22214/ijraset.2021.34605.

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16

Chen, J. P. "Fault Diagnosis Model for Hydraulic Punching Machine." Materials Science Forum 626-627 (August 2009): 523–28. http://dx.doi.org/10.4028/www.scientific.net/msf.626-627.523.

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A modeling method termed as the discrete time hybrid Diagnosis (DTHD) is presented to constructure models for a hydraulic punching machine. The DTHD method is an extension of the works on FDD (the fault detection and diagnosis) which are based on FSM-based modeling. FDD of DTHD models are suited for real time systems because of their capability of detecting faults leading to failures in terms of erroneous delays and deadlines. The occurrences of faults or failures are represented for individual system components by categorizing the set of states of each individual system component model into normal or failed conditions of various types. The condition corresponding to the states (of a component model) are represented by an unmeasurable variable. The components are then composed to produce the overall representation of failures on the whole system model with a single unmeasurable variable.

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Makaryants, Georgy M., Andrey B. Prokofiev, and Evgeny V. Shakhmatov. "Vibroacoustics Analysis of Punching Machine Hydraulic Piping." Procedia Engineering 106 (2015): 17–26. http://dx.doi.org/10.1016/j.proeng.2015.06.004.

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G, Veeresha. "Design and Fabrication of Cost-Effective Agriculture Machine." International Journal for Research in Applied Science and Engineering Technology 9, no. 9 (2021): 284–88. http://dx.doi.org/10.22214/ijraset.2021.37942.

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Abstract: Mulching has long been used to conserve soil moisture, manage weeds, modify soil temperature, and create a microclimate for plants. There are a variety of strategies for improving crop growing conditions, including increasing productivity and reducing the amount of water necessary to grow the crops. However, mulching paper, also known as agricultural film, is one of the most effective ways to cover the soil and keep the crop in the right environment This mulching paper comes in a varietyof varieties, but because plastic mulching is well-known for requiring less effort, we've chosen to work on an automatic mulching paper laying machine that also includes a drip laying attachment. Moisture in the soil is critical for crop survival in arid environments. Mulching with plastic paper film around theroot area of plants prevents weed growth while also storing water and preventing soil dehydration, however this method takes a lot of money and time. So the 'Mulching paper laying machine with hole punching' will save money and time because it will handle both chores at once, laying mulching paper and punching holes in the ground. A body, a mainframe with hoeing blades, hole punching wheels, drip role holder, and punching mechanism make up the plastic mulch laying machine. The mulch was laid on the prepared plantation bed by the machine in conjunction with the drip pipe. This will lay mulch onthe bed without destroying it, as well as punch the holes to the desired dimensions. The product might be used in agriculture to grow tomatoes, watermelons, muskmelons, and other hybrid varieties of crops. Bylowering the capital cost and time of laying the mulching paper using the most convenient way, as well as installing the drip irrigation pipe in one pass of the machine, it will be simple for the farmer. (Key words: agriculture, mulching paper, weed control)

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19

Arunkumar, G., J. Tison Antonio, and Velayutham Pon. "Design and Development of Autofeed Pneumatic Punching and Riveting Machine." Journal of Physics: Conference Series 2054, no. 1 (2021): 012025. http://dx.doi.org/10.1088/1742-6596/2054/1/012025.

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Abstract Metal as sheets are more significant. However, metal as sheets can’t be straightforwardly utilized, activities like punching, blanking, twisting, riveting, and so forth are should be done on the metal sheets. For these activities, most enormous scope fabricating businesses utilize powerfully worked machines which are not savvy, generally little and medium scale enterprises utilize hand-worked machines for completing sheet metal activity which are moderate. 6 bar pressure is enough for these machines to work. The compressed air is going through the cylinders to the chamber powers the cylinder out which thus incites the cylinder down which thus does the way toward punching or riveting. This empowers us to utilize various kinds of hardware to perform various tasks. After the consummation of punch or rivet in the sheet metal the compressed air flows to the lower part of the chamber which incites the cylinder upwards so the metal is liberated from the tool and the following punch or rivet measure is made accessible. As per the functioning material the functioning pressing factor can be changed. This empowers us to utilize various kinds of punch or rivet apparatus which helps in bringing about a wide scope of items.

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Jaysrichai, Tossaphon, Kachonsak Srikongphan, and Pornchalit Jurarakpong. "A Development Machine for Measuring the Precision and the Response Time of Punches." Open Biomedical Engineering Journal 13, no. 1 (2019): 151–57. http://dx.doi.org/10.2174/1874120701913010151.

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Objective: To develop and evaluate the device for measuring precision (in percentage) and response time (in seconds) of punches. Methods: Researchers cooperated with Sports Authority of Thailand and the Amateur Boxing Association of Thailand in development. Results: Robo-Boxing Trainer machine consisted of four targets. Each punching target has eight sensors and eight LED lights. Operating software, which programmed by PLC-CX programmer and DOPSoft (delta), can set the punching series and alarm signals. It recorded the response time from the starting signal to making contact with the target, calculating precision in percentage. This software could be set and recorded maximal 40 series and maximal 100 punches in each punching series. Researchers compared the accuracy of counting time with Digital Oscilloscope and tested the efficiency of sensors’ cutting signal. This study found the counting time to be of high accuracy (100% and 98.8%). The cutting sensors' signal test found to be efficient. Conclusion: Robo-Boxing Trainer machine, which is high in accuracy, may help to test and improve a boxer’s skills. Also, it can apply to train for other related sports.

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21

Hendriko, Hendriko, Alfiandis Lafebri, Made Rahmawaty, and Tianur Tianur. "The Development of automatic melinjo puncher machine using pneumatics pressure." INVOTEK: Jurnal Inovasi Vokasional dan Teknologi 21, no. 3 (2021): 157–64. http://dx.doi.org/10.24036/invotek.v21i3.936.

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Melinjo chip is one of Indonesia’s facourite food. Melinjo chip is not only marketed in Indonesia, but they have been exported to various countries including Netherlands, United State of America, and Middle East. Mostly melinjo chips are produced in the traditional way by home industry and MSMEs. The existing machines to produce melinjo chips are not operated fully automatically; hence they still require significant operator involvement. The machine developed in this study uses a pneumatics pressure as power driver. Pneumatics cylinders are used to push the melinjo seeds onto the flattening base, and to move the puncher rod during flattening process. The developed automatic melinjo punching machine has been tested. The tests were carried out to determine the parameters used for programming the machine, sucah as punching time and pneumatic presure, and for checking the capacity of the machine. The test results show that the most effective punching time is 5 seconds at pressure between 5-7 bar. In 5 seconds, the machine can change melinjo seed into chips shape with thickness in between 1,20-1,45 mm. The capacity of the machine in processing melinjo has also been tested. The results showed that this machine can process 528 melinjo into chips shape melinjo per hour.

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Dems, Maria, Krzysztof Komeza, Zbigniew Gmyrek, and Jacek Szulakowski. "The Effect of Sample’s Dimension and Cutting Technology on Magnetization and Specific Iron Losses of FeSi Laminations." Energies 15, no. 6 (2022): 2086. http://dx.doi.org/10.3390/en15062086.

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The process of cutting laminations from which the cores of electric machines are built causes a change in their magnetic properties and losses, which can significantly affect machines’ parameters, mainly losses of power and efficiency. Electric motors are a significant consumer of electricity; therefore, the problem of increasing their efficiency is fundamental from the point of view of environmental impact. The subject of the work is the study of the influence of punching and laser cutting on the magnetization and loss characteristics of sheets, taking into account the phenomenon of magnetic anisotropy. For this purpose, samples cut in different directions were tested. As the direction of the field action in the motor core varies in different parts of the machine and time moments, it was investigated how to obtain average characteristics for different directions of magnetization. Then, a simplified method for determining the characteristics of punched sheets of various widths based on small-width samples and water cut samples is presented. The proposed solutions allow for refinement of the calculations of magnetic circuits with a simplified consideration of the influence of punching.

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23

Youssef, Mohamad EL, AbdelKader Benabou, Thierry Coorevits, et al. "Punching effect directly on electrical machine stator strips." International Journal of Applied Electromagnetics and Mechanics 61 (July 24, 2019): S107—S114. http://dx.doi.org/10.3233/jae-191291.

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24

Ye, Yunyue. "New punching machine driven by linear induction motor." Chinese Journal of Mechanical Engineering (English Edition) 13, no. 03 (2000): 224. http://dx.doi.org/10.3901/cjme.2000.03.224.

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Fendi, Fiqi, and Yohanes Yohanes. "Design Development of Punching and Bending Machine Combination." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 66, no. 1 (2022): 27–31. http://dx.doi.org/10.36842/jomase.v66i1.275.

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This paper purpose is to study working pressure limit of the machine combination between blanking and punching process. The combination punch and bending machine in this study is a machine that belongs to the press type with the use of punch and die. This machine has a hydraulic drive with a maximum pressure generated of 700 bars. The engine performance is only able to withstand a working pressure of 27.7 bars. Therefore, the utilization of the working pressure must be increased to maximize the working pressure. The analysis was carried out on the machine with two methods, namely simulation and experiment. The simulation method was carried out using Autodesk Inventor software to design and simulate in order to find out the critical points that occur on the machine. It was given working pressure according to the permitted safety factor of 1.5. The experimental method was carried out by measuring the voltage using a Strain gauge sensor positioned at the critical point obtained in the simulation and measuring the deflection using a dial indicator. From these tests, it was found that the initial working pressure before being optimized was 27.7 bars to 49.5 bars after being optimized.

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Fiebig, Wieslaw, and Jakub Wrobel. "Use of mechanical resonance in impact machines." MATEC Web of Conferences 211 (2018): 17006. http://dx.doi.org/10.1051/matecconf/201821117006.

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An innovative method exploiting mechanical resonance in machines drive systems, especially useful in impact machines, has been developed. Accumulation of energy at resonance can be applied to the drive system in a similar way as flywheels in eccentric presses. Under resonance conditions, the total energy consumption of the oscillating mass is equal to the energy lost due the damping forces. Energy accumulated in the oscillator can be several times greater than the energy supplied continuously to the oscillator. The developed method can be used in many applications, especially in impacting machines. Finally, the energy demand of resonance punching press will be compared with the energy demand of eccentric press.

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Sutton, P. A., O. Clifford, and T. R. C. Davis. "A New Mechanism of Injury for Scaphoid Fractures: ‘Test Your Strength’ Punch-Bag Machines." Journal of Hand Surgery (European Volume) 35, no. 5 (2010): 419–20. http://dx.doi.org/10.1177/1753193409352713.

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We investigated the mechanism of injury in a consecutive series of 153 confirmed scaphoid fractures. We found that ten (6%) occurred as a result of using a ‘test your strength’ punch-bag machine, a device found in public houses and amusement arcades. Clinicians should be aware that scaphoid fractures can occur as a result of punching these machines or other similar objects.

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Shen, Yuanxie, Junhao Sun, and Shixue Liang. "Interpretable Machine Learning Models for Punching Shear Strength Estimation of FRP Reinforced Concrete Slabs." Crystals 12, no. 2 (2022): 259. http://dx.doi.org/10.3390/cryst12020259.

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Fiber reinforced polymer (FRP) serves as a prospective alternative to reinforcement in concrete slabs. However, similarly to traditional reinforced concrete slabs, FRP reinforced concrete slabs are susceptible to punching shear failure. Accounts of the insufficient consideration of impact factors, existing empirical models and design provisions for punching strength of FRP reinforced concrete slabs have some problems such as high bias and variance. This study established machine learning-based models to accurately predict the punching shear strength of FRP reinforced concrete slabs. A database of 121 groups of experimental results of FRP reinforced concrete slabs are collected from a literature review. Several machine learning algorithms, such as artificial neural network, support vector machine, decision tree, and adaptive boosting, are selected to build models and compare the performance between them. To demonstrate the predicted accuracy of machine learning, this paper also introduces 6 empirical models and design codes for comparative analysis. The comparative results demonstrate that adaptive boosting has the highest predicted precision, in which the root mean squared error, mean absolute error and coefficient of determination of which are 29.83, 23.00 and 0.99, respectively. GB 50010-2010 (2015) has the best predicted performance among these empirical models and design codes, and ACI 318-19 has the similar result. In addition, among these empirical models, the model proposed by El-Ghandour et al. (1999) has the highest predicted accuracy. According to the results obtained above, SHapley Additive exPlanation (SHAP) is adopted to illustrate the predicted process of AdaBoost. SHAP not only provides global and individual interpretations, but also carries out feature dependency analysis for each input variable. The interpretation results of the model reflect the importance and contribution of the factors that influence the punching shear strength in the machine learning model.

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Chen, Ping, Hua Feng Mei, and Rong Hu. "Application of Variation Weight Fuzzy Comprehensive Evaluation Method on Decision-Making of Stamping Process." Applied Mechanics and Materials 548-549 (April 2014): 1911–15. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.1911.

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Problems on resource and environment are found through the analysis of traditional stamping process. The theory of variation weight fuzzy comprehensive evaluation method is introduced and the evaluation model has been built. Then the weight-constant and weight-variation fuzzy comprehensive evaluation methods are used to evaluate the selection of punching machines. The conclusion proves that the variation weight makes the evaluation more scientific and accurate.

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Singh, U. P., W. Klingenberg, and W. Urquhart. "Effect of Tool Geometry on Punching Performance." Journal of Engineering for Industry 116, no. 4 (1994): 508–13. http://dx.doi.org/10.1115/1.2902135.

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In today’s competitive industrial environment, the quality of a product is no longer the major factor which influences purchase by a customer, it is simply a prerequisite for competing in the market. To compete and survive, the necessity is to provide the product at an affordable price, a target that can only be attained through actions such as improving the efficiency of manufacturing operations. In sheet metal industries, the cost of tooling contributes a considerable part to the overall manufacturing cost of a component. It is imperative to keep this cost down by ensuring the tool operates uninterrupted for long periods of time, achievable in one way by reducing the stress on the tool during punching by optimizing the clearance between the die and the punch. This paper deals with this problem using finite element techniques. Having created models of various punch configurations, one is able to analyze the effect of variations in tool geometry on punching force and tool deformation, a parameter highly relevant in assessing performance in terms of the accuracy of machined components. Computed results using FE models are compared against results obtained through experimentation. Due to the nature of the punching process being inherently noisy, consideration was given to noise levels, how they are affected by changes in tool geometry, and the subsequent effect on the workforce considering the fact that reducing stress on the operator could only improve quality and productivity. Finally, some suggestions are given as to how the efficiency of a punching tool and quality of the punched product can be improved.

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Xie, Jun Hui, and Jian Chang Yuan. "Vibration Analysis of Needle-Punching Machine Slider-Crank Mechanism." Applied Mechanics and Materials 215-216 (November 2012): 730–34. http://dx.doi.org/10.4028/www.scientific.net/amm.215-216.730.

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After analysis of the movement characteristics of needle-punching machine slider-crank mechanism in theory, a slider-crank mechanism acceleration curve had been rendered by MATLAB software and acceleration movement curve had been drawn after the measurement of acceleration of slider-crank mechanism by ADAMS simulation software. Through the comparison between the two results, a conclusion had been drawn. Finally, 3 advice of minishing vibration had been given according to the conclusion of calculation of acceleration by Quality Substitution Method,the first advice is the quality and site of the balance block are chose appropriately,the second advice is the weight of the slider and the connecting rod need to be reduced by choosing appropriate material.

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Z. Ibrahim, Fazri, and Yohanes Yohanes. "Performance Analysis of Plate Punching and Bending Machine Combination." Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) 65, no. 3 (2021): 117–24. http://dx.doi.org/10.36842/jomase.v65i3.272.

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The plate punching and bending combination machine is a machine that belongs to the press type with the use of a punch and a die to make holes or bends in a plate work-piece. This machine uses a hydraulic drive with a maximum working pressure of 700 Bars, which is used as a punch force to work-piece. But, it is not known the value of working pressure this frame can withstand. Therefore, machine performance becomes unknown such as punch force that can be used, work-piece thickness, whole circumference and type of material that can be machined. In this paper, the analysis is carried out using simulation and experimental methods. The simulation method is carried out using Autodesk Inventor software to determine the critical location, which is then measured by experiment. The experimental method is carried out by measuring the stress and deflection. Voltage measurement on the frame is carried out using a strain gauge sensor and measurements are carried out using a dial indicator. The application of a safety factor is 1.5 based on the yield strength of ASTM A36 as the frame material. The deflection that has occurred is 1.15 mm, the maximum working pressure obtained is 27.7 Bars. The maximum punch force is 5441 N.

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Chang, De Gong, Guang Zhen Zhou, Hong Yun Dou, and C. C. Wang. "Virtual Prototype Analysis for the Manipulator of Punching Machine." Key Engineering Materials 561 (July 2013): 609–13. http://dx.doi.org/10.4028/www.scientific.net/kem.561.609.

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In this paper, the 3D model was built by the software Pro/E. Virtual Prototype analysis for the manipulator of punching machine was carried out by the software ADAMS. The force, torque and angular velocity were calculated respectively under the step5 driving function condition. Through analysis and comparison, the result shows that the working condition was better when the step5 function was applied. This laid the foundation of the manipulator driving programming.

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., Pratik D. Tak. "POKA YOKE IMPLIMENTATION ON PUNCHING MACHINE: A CASE STUDY." International Journal of Research in Engineering and Technology 04, no. 02 (2015): 98–106. http://dx.doi.org/10.15623/ijret.2015.0402014.

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Shen, Lulu, Yuanxie Shen, and Shixue Liang. "Reliability Analysis of RC Slab-Column Joints under Punching Shear Load Using a Machine Learning-Based Surrogate Model." Buildings 12, no. 10 (2022): 1750. http://dx.doi.org/10.3390/buildings12101750.

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Reinforced concrete slab-column structures, despite their advantages such as architectural flexibility and easy construction, are susceptible to punching shear failure. In addition, punching shear failure is a typical brittle failure, which introduces difficulties in assessing the functionality and failure probability of slab-column structures. Therefore, the prediction of punching shear resistance and corresponding reliability analysis are critical issues in the design of reinforced RC slab-column structures. In order to enhance the computational efficiency of the reliability analysis of reinforced concrete (RC) slab-column joints, a database containing 610 experimental data is used for machine learning (ML) modelling. According to the nonlinear mapping between the selected seven input variables and the punching shear resistance of slab-column joints, four ML models, such as artificial neural network (ANN), decision tree (DT), random forest (RF), and extreme gradient boosting (XGBoost) are established. With the assistance of three performance measures, such as root mean squared error (RMSE), mean absolute error (MAE), and coefficient of determination (R2), XGBoost is selected as the best prediction model; its RMSE, MAE, and R2 are 32.43, 19.51, and 0.99, respectively. Such advantages are also reflected in the comparison with the five empirical models introduced in this paper. The prediction process of XGBoost is visualized by SHapley Additive exPlanation (SHAP); the importance sorting and feature dependency plots of the input variables explain the prediction process globally. Furthermore, this paper adopts Monte Carlo simulation with a machine learning-based surrogate model (ML-MCS) to calibrate the reliability of slab-column joints in a real engineering example. A total of 1,000,000 samples were obtained through random sampling, and the reliability index β of this practical building was calculated by Monte Carlo simulation. Results demonstrate that the target reliability index requirements under design provisions can be achieved. The sensitivity analysis of stochastic variables was then conducted, and the impact of that analysis on structural reliability was deeply examined.

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Rao, Jun. "Punching Machine Driver Research Based on Pulse Electromagnetic Force Actuator." Applied Mechanics and Materials 416-417 (September 2013): 78–81. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.78.

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Punch variety of drives, hydraulic, motor type is also commonly used. Conventional press drives both in terms of simplicity of the structure also in terms of effectiveness of control are present many problems. As is a background on the background of press drive innovative design, research on pulsed electric-magnetic field driven punch. Thanks to electro-magnetic direct drive, the system structure is simple, convenient control flexible, changing the timing and amplitude of excitation pulse, can change the speed and direction of movement of permanent magnet ring and have the output force of significant features. From the design on the effect of pulse electromagnetic drive punch, its index relative to the mechanical structure has improved, such as stamping frequencies up to 300 times/min, noise less than 80dB, volume reduction of cent, reduce the weight of 60%. This structure can greatly improve the working speed of the punch, while simplifying punch drive mechanical structure.

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Cho, Hyun-Seob, and In-Ho Ryu. "Development of Inverter Control System for Speed Control Punching Machine." Journal of the Korea Academia-Industrial cooperation Society 9, no. 3 (2008): 628–31. http://dx.doi.org/10.5762/kais.2008.9.3.628.

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Alaneme, K. K., B. O. Adewuyi, and F. A. Ofoegbu. "Failure analysis of mould dies of an industrial punching machine." Engineering Failure Analysis 16, no. 7 (2009): 2043–46. http://dx.doi.org/10.1016/j.engfailanal.2009.01.006.

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Shah, Sahas Bikram, Paavo Rasilo, Anouar Belahcen, and Antero Arkkio. "Modeling of Losses Due to Inter-Laminar Short-Circuit Currents in Lamination Stacks." Electrical, Control and Communication Engineering 3, no. 1 (2013): 31–36. http://dx.doi.org/10.2478/ecce-2013-0012.

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Abstract The cores of electrical machines are generally punched and laminated to reduce the eddy current losses. These manufacturing processes such as punching and cutting deform the electrical sheets and deteriorate its magnetic properties. Burrs are formed due to plastic deformation of electrical sheets. Burr formed due to punching on the edges of laminated sheets impairs the insulation of adjacent sheet and make random galvanic contacts during the pressing of stacked sheets. The effect of circulating current occurs if the burrs occur on the opposite edges of the stacks of laminated sheets and incase of bolted or wielded sheets, induced current return through it. This induced current causes the additional losses in electrical machine. The existence of surface current on the boundary between two insulated regions causes discontinuity of tangential component of magnetic field. Hence, based on this principle, the boundary layer model was developed to study the additional losses due to galvanic contacts formed by burred edges. The boundary layer model was then coupled with 2-D finite element vector potential formulation and compared with fine mesh layer model. Fine mesh layer model consists of finely space discretized 950028 second order triangular elements. The losses were computed from two models and were obtained similar at 50 Hz. The developed boundary layer model can be further used in electrical machines to study additional losses due to galvanic contacts at the edges of stator cores.

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Forshaw, H. "Punchbag machine injuries in a nightclub." Emergency Medicine Journal 17, no. 6 (2000): 432. http://dx.doi.org/10.1136/emj.17.6.432.

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P, NAGAPRAKASH, C. MATHALAI SUNDARAM, A. VENNIMALAI RAJAN, J. CHAKRAVARTHY SAMY, and DURAI A. Vembathu Rajesh. "Design and Fabrication of Computerized Numerical Control Based Pneumatic Punching Machine." INTERNATIONAL JOURNAL OF RECENT TRENDS IN ENGINEERING & RESEARCH 05, no. 06 (2019): 11–16. http://dx.doi.org/10.23883/ijrter.2019.5056.fbzhb.

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Sathish, T., N. Sabarirajan, and S. Karthick. "Analysis and design of smart paper punching machine for spiral binding." Materials Today: Proceedings 33 (2020): 2564–66. http://dx.doi.org/10.1016/j.matpr.2019.12.105.

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Hu, Si Qian, Hai Ping Wang, Yu Min Zhang, and Xin Zou. "Polytetrafluoroethylene Mesh for Many Types of Blueprinting Machine: Preparation and Characterization." Advanced Materials Research 317-319 (August 2011): 48–52. http://dx.doi.org/10.4028/www.scientific.net/amr.317-319.48.

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Adopting domestic polytetrafluoroethylene (PTFE) turning plate as materials, a new isosceles triangle macroporous mesh was designed. The correspond mould and the special fixtures for continuous punching of ultra-thin plastic sheet were successfully developed. The PTFE mesh was manufactured through computer numerically controlled (CNC) punch. In terms of electronic universal testing machines and microcomputer differential thermal balance, mechanical properties and thermostability of the PTFE mesh were studied. The results indicated that the tensile strength of PTFE mesh is 11.98 MPa which is greater than the literature value of 7.77 MPa, and its heat-resisting performance is excellent without decomposition prior to 312 oC.

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Thet, Paing, Zaya Kyaw, and A. V. Kornilova. "Creation of a design methodology for crank punching machines of specified durability." IOP Conference Series: Materials Science and Engineering 675 (November 15, 2019): 012042. http://dx.doi.org/10.1088/1757-899x/675/1/012042.

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Ji-li, Wang, Yang Zhao-jun, Chen Fei, Li Guo-fa, and Chen Chuan-hai. "Minimum Effort Reliability Allocation Method Considering Fuzzy Cost of Punching Machine Tools." Journal of Applied Sciences 13, no. 20 (2013): 4107–13. http://dx.doi.org/10.3923/jas.2013.4107.4113.

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Kumala Sriwana, Iphov, and Nadya Syauqillah. "Analysis of Overall Effectiveness on Hall Separator Punching Machine at PT. DNIA." IOP Conference Series: Materials Science and Engineering 847 (May 28, 2020): 012035. http://dx.doi.org/10.1088/1757-899x/847/1/012035.

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Homberg, W., and Tim Rostek. "High Performance Active Elements for Agricultural Machines Made of Ultra High-Strength Steels." Key Engineering Materials 473 (March 2011): 229–34. http://dx.doi.org/10.4028/www.scientific.net/kem.473.229.

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This article will highlight various aspects of the production process of high performance active elements made of ultra high-strength steels. Focus is put on the processing of thick sheet metal regarding hot forming by means of punching, embossing, and forging processes as well as on thermo-mechanical treatment. Due to the material thickness of the semi-finished parts/blanks used and owing to the high strength of the materials (Rm > 2600 MPa) current production techniques and parameters from the field of thin sheet metal can only be limitedly be transferred and have therefore been specially investigated for this application.

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Senthil Kumar, N., K. Shabaridharan, R. Perumalraj, and V. Ilango. "Study on cross-directional tensile properties of bamboo-/polypropylene-blended needle-punched non-woven fabrics." Journal of Industrial Textiles 47, no. 6 (2017): 1342–56. http://dx.doi.org/10.1177/1528083717690611.

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In this study, bamboo and polypropylene fibers have been selected to produce non-woven fabrics using needle punching machines. The non-woven fabrics were produced with bamboo and polypropylene blends of 80%/20%, 20%/80% and 50%/50%, respectively. The cross-directional tensile properties of produced non-woven fabrics were analyzed using Box–Behnken experimental design for three factors and three levels by varying aerial density, punch density and depth of needling penetration. It was observed that the 20% bamboo/80% polypropylene non-woven fabrics have higher tensile strength and elongation than the other two blend proportions. The tensile strength increases with increase in aerial density, punch density and depth of needle penetration.

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Liu, Si Yu, Pei Feng, and Chong Chang Yang. "The Study Based on LABVIEW of the Positioning Accuracy of Spinneret Microporous Fine Machine." Advanced Materials Research 712-715 (June 2013): 1347–50. http://dx.doi.org/10.4028/www.scientific.net/amr.712-715.1347.

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The microporous on spinneret has the characteristics of high precision, small pore size and large quantity. Spinneret microporous finishing operation is mainly used for removing the burr formed on the spinneret silk surface after micropores drilling and punching. The burrs seriously affect the quality of the spinning fibers. Micropore spinneret finishing plays a vital role in improving the quality of processing micropore. This paper introduces a system consisting of the spinneret micropore fine machine,then focuses on fine machine positioning system and proposes a high-precision positioning method of the microporous.

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Quan, Wei, Mingliang Wu, Zhenwei Dai, Haifeng Luo, and Fanggang Shi. "Design and Testing of Reverse-Rotating Soil-Taking-Type Hole-Forming Device of Pot Seedling Transplanting Machine for Rapeseed." Agriculture 12, no. 3 (2022): 319. http://dx.doi.org/10.3390/agriculture12030319.

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To address the problem whereby the size of the hole formed by the existing hole-forming device of hole-punching transplanters is significantly inconsistent with the theoretical size as it is impacted by the inserting and lifting methods, a scheme for eliminating the forward speed of the whole machine by the horizontal linear velocity of reverse rotation of the hole-forming mechanism is proposed to vertically insert and lift the hole-forming device in accordance with the working characteristics of hole-punching transplanting and the agronomic requirements of rapeseed transplanting. In addition, a novel type of reverse-rotating soil-taking-type hole-forming device for the pot seedling transplanting machine for rapeseed was developed. A test bench for the hole-forming device was set and its effectiveness was verified in the soil bin. It was found, from the test results, that, when the forward speed of the hole-forming device was between 0.25 m/s and 0.45 m/s, the average qualified rates of hole forming of the device were 95.2%, 94.0% and 93.3%, respectively; the average change rates of the hole size were 2.3%, 2.9% and 5.5%, respectively; and the average error between the theoretical value of effective depth and the experimental value was between 2.0% and 5.6%. The average angle between the hole-forming stage trajectory of the hole opener and the horizontal direction at different forward speeds was higher than 88.0°; the coefficient of variation was between 0.16% and 0.64%; the perpendicularity of the hole-forming operation was high; the change rates of soil porosity of the hole wall were between 8.2% and 9.3%; and the average soil heave degrees at the hole mouth after the completion of the hole-forming operation were 3.9%, 4.1% and 4.2%, respectively. The average soil stability rates of the hole wall were 91.9%, 91.2% and 91.0%, respectively. The different performances of the hole-forming device were confirmed to meet the requirements of rapeseed pot seedling transplanting. This study can provide a reference for the structural improvement and optimization of the hole-punching transplanter for rapeseed pot seedlings.

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